refactor(github): convert some clasess to static fields (#5556)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

services/github/github-code-size.service.js

@@ -5,36 +5,25 @@ const { BaseGithubLanguage } = require('./github-languages-base')
 const { documentation } = require('./github-helpers')
 
 module.exports = class GithubCodeSize extends BaseGithubLanguage {
-  static get category() {
-    return 'size'
+  static category = 'size'
+  static route = {
+    base: 'github/languages/code-size',
+    pattern: ':user/:repo',
   }
 
-  static get route() {
-    return {
-      base: 'github/languages/code-size',
-      pattern: ':user/:repo',
-    }
-  }
-
-  static get examples() {
-    return [
-      {
-        title: 'GitHub code size in bytes',
-        namedParams: {
-          user: 'badges',
-          repo: 'shields',
-        },
-        staticPreview: this.render({ size: 1625000 }),
-        documentation,
+  static examples = [
+    {
+      title: 'GitHub code size in bytes',
+      namedParams: {
+        user: 'badges',
+        repo: 'shields',
       },
-    ]
-  }
+      staticPreview: this.render({ size: 1625000 }),
+      documentation,
+    },
+  ]
 
-  static get defaultBadgeData() {
-    return {
-      label: 'code size',
-    }
-  }
+  static defaultBadgeData = { label: 'code size' }
 
   static render({ size }) {
     return {